Demand-based cooling and monitoring from a fan-and-filter unit

05 May 2015

Rittal has introduced a new EC Speed Control, compatible with larger models in its TopTherm EC fan-and-filter unit range.

Fan-and-filter units with electronically commutated (EC)  motors for electrical enclosure cooling are already recognised for their lower energy consumption and extended service life. Infinite speed control as well as a monitoring signal are also much simpler to incorporate in an EC motor than on the AC motor equivalent.

Rittal’s new EC Speed Control supports these benefits and adds a number of others. It can be used to reduce noise output of EC fan-and-filter units and can lower energy consumption further by controlling the speed of up to four units.  Cooling demand – and hence the required fan speed – is determined by comparing the sensed temperature inside the enclosure with the set-point temperature on the device, from +5°C to +55°C.

The Rittal EC Speed Control is also able to closely monitor the status of the fan.  The unit provides a local visual display of the operating status and incorporates an alarm relay for the remote monitoring of over-temperature, fan defect, cable break and
sensor failure.

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